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The classical-quantum boundary for correlations: discord and related measures
Kavan Modi, Aharon Brodutch, Hugo Cable +2
One of the best signatures of nonclassicality in a quantum system is the existence of correlations that have no classical counterpart. Different methods for quantifying the quantum…
Criteria for measures of quantum correlations
Aharon Brodutch, Kavan Modi
Entanglement does not describe all quantum correlations and several authors have shown the need to go beyond entanglement when dealing with mixed states. Various different measures…
Photon polarization and geometric phase in general relativity
Aharon Brodutch, Tommaso F. Demarie, Daniel R. Terno
Rotation of polarization in an external gravitational field is one of the effects of general relativity that can serve as a basis for its precision tests. A careful analysis of ref…
Polarization rotation, reference frames and Mach's principle
Aharon Brodutch, Daniel R. Terno
Polarization of light rotates in a gravitational field. The accrued phase is operationally meaningful only with respect to a local polarization basis. In stationary space-times, we…
Quantum discord in quantum computation
Aharon Brodutch, Alexei Gilchrist, Daniel R. Terno +1
Quantum discord is a measure of the quantumness of correlations. After reviewing its different versions and properties, we apply it to the questions of quantum information processi…